What is wrong with AI Controller?

I am trying to do some kind of AI based simulation of passengers
I got a few spawner and spawn different agents with DetourAIController.
A big problem is when a single agent gets stuck somewhere, new spawned agents inherit this “stucking behaviour”

Blueprint is very simple. I am using AIMoveto most of the times.
Now why I think it must be a Controller problem. Because when I mix agents with DetourAiController an with just AI Controller and when some agent thats gets stuck doesnt influent another agent with different controller type.

problem number 2: Is there a way to handle AIMoveTo status blocked? I remember Ian Shadden made tutorial on AI and promised to post the solution somewhere on the forum. I couldnt find that